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Analog Devices Inc./Maxim Integrated MAX6225ACSA+
- Part No.:
- MAX6225ACSA+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Voltage Reference
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX6225ACSA+.pdf
- Description:
- IC VREF SERIES 0.04% 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:316
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Product details
Overview
MAX6225ACSA+ from Maxim Integrated is a precision 2.500V buried-zener voltage reference IC with 1.0ppm/°C max temperature coefficient, ±0.02% initial accuracy, and 1.5μVP-P (0.1Hz–10Hz) output noise-designed for high-resolution ADC/DAC biasing in metrology-grade instrumentation and ATE systems.
For engineers reviewing the MAX6225ACSA+ datasheet, MAX6225ACSA+ pinout, MAX6225ACSA+ application, or MAX6225ACSA+ equivalent, key selection criteria include low-drift stability over 0°C to +70°C, ±15mA sourcing/sinking capability, optional external trim and noise reduction, and compatibility with capacitive loads up to 100μF without oscillation.
Technical Context
The MAX6225ACSA+ employs buried-zener core technology with on-chip temperature compensation to achieve near-zero curvature across its operating range. Its internal architecture supports simultaneous high-accuracy DC regulation and low-noise spectral performance via dedicated NR and TRIM terminals.
It delivers stable 2.500V output under input voltages from 8V to 36V, maintains ±6ppm/mA load regulation (sourcing), and exhibits <5μs turn-on settling to ±0.01%, enabling use in fast-cycling precision data acquisition systems where reference integrity must be preserved during dynamic load transitions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 2.500V ±1mV at +25°C - ensures sub-LSB error in 16-bit systems (±0.02% initial accuracy) |
| Tempco | 1.0ppm/°C max (0°C to +70°C) - enables ≤2.5μV/°C drift in lab-grade calibration equipment |
| Output Noise | 1.5μVP-P (0.1Hz–10Hz) - critical for low-frequency precision measurements without added filtering |
| Load Current | ±15mA sourcing/sinking - supports direct driving of op-amp inputs and DAC reference inputs without buffers |
| Line Regulation | 2ppm/V (10V–36V) - minimizes supply ripple impact in unregulated industrial power rails |
| Long-Term Stability | 20ppm/1000h - guarantees minimal calibration drift in deployed test equipment over extended service intervals |
| Supply Current | 2.7mA max - enables low-power operation in battery-backed metrology modules |
Pinout & Package
MAX6225ACSA+ is housed in an 8-pin SO (Small Outline) package compliant with RoHS and lead-free standards (S8+5 outline, land pattern 90-0096). The package supports surface-mount reflow up to +260°C and provides industry-standard footprint compatibility.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 7, 8 | I.C. (Internally Connected) | No external connection required; electrically tied internally and unused |
| 2 | IN | Positive supply input (8V–36V); requires local bypass capacitor for ripple rejection |
| 3 | NR | Noise reduction node; accepts 1μF capacitor to reduce wideband output noise by >20dB |
| 4 | GND | Analog ground reference; must be star-connected to minimize ground bounce in mixed-signal PCBs |
| 5 | TRIM | External voltage adjust input; enables ±15mV (±0.6%) fine-tuning via 10kΩ potentiometer |
| 6 | OUT | Stable 2.500V reference output; capable of driving 0–100μF capacitive loads without instability |
Key Features
| Feature | Design Value |
|---|---|
| Buried-zener core | Delivers lowest intrinsic noise (1.5μVP-P) and highest long-term stability (20ppm/1000h) among precision references |
| Optional NR capacitor | 1μF on NR pin reduces broadband noise without affecting DC accuracy or thermal drift |
| Trim-adjustable output | ±15mV adjustment range preserves full temperature coefficient spec while enabling system-level calibration |
| Capacitive-load tolerant | Stable with 0–100μF output capacitance - eliminates need for isolation resistors in noisy environments |
| Fast transient response | ≤5μs settling to ±0.01% after load step - maintains reference fidelity during multiplexed ADC sampling |
Applications
| Digital Voltmeter Calibration | 16-Bit SAR ADC Reference |
|---|---|
Use Scenario: High-accuracy benchtop DVM requiring traceable 2.5V reference for 7½-digit resolution. IC Role / Device Role / Timing Role: Primary voltage standard providing excitation and measurement reference for dual-slope integrator circuitry. Use Value: 1.0ppm/°C tempco and 20ppm/1000h stability eliminate recalibration cycles between NIST audits. | Use Scenario: Industrial data logger capturing sensor signals with 16-bit resolution across -25°C to +75°C ambient. IC Role / Device Role / Timing Role: Precision reference for SAR ADC reference input (REF+) and bias network. Use Value: ±15mA drive strength directly powers ADC internal reference buffer, avoiding external op-amp and associated drift sources. |
| ATE Pin Electronics | Precision Current Source |
Use Scenario: Automated test equipment channel card generating programmable analog stimulus with <10ppm total error budget. IC Role / Device Role / Timing Role: Master reference for DAC-controlled current/voltage source with real-time calibration feedback. Use Value: Low 1.5μVP-P noise prevents RMS error inflation in low-level signal generation (<100mV full-scale). | Use Scenario: Programmable 4–20mA transmitter requiring stable 2.5V reference for V/I conversion resistor scaling. IC Role / Device Role / Timing Role: Fixed-voltage setpoint for op-amp-based Howland current source topology. Use Value: ±0.02% initial accuracy and 2ppm/V line regulation ensure <0.1% total loop error across varying supply conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar precision voltage reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADR441BRZ | 2.5V output, 1.5ppm/°C max tempco, higher 3.5μVP-P noise, 10mA max output | Limited sink capability and higher noise restrict use in high-speed 16-bit ADCs with dynamic loading | Select when lower cost and SOIC-8 footprint are prioritized over ultra-low noise and ±15mA drive |
| REF5025IDR | 2.5V output, 3ppm/°C max tempco, 5.5μVP-P noise, 10mA max output, no NR pin | Absence of noise-reduction pin and higher drift limit suitability for non-metrology industrial control | Choose for cost-sensitive process controllers where 16-bit resolution is not required |
Compared with ADR441BRZ and REF5025IDR, the MAX6225ACSA+ offers superior noise performance and full ±15mA bidirectional drive-making it uniquely suited for metrology-grade ATE and high-fidelity data converters where reference-induced errors must remain below 0.5 LSB.
Availability
MAX6225ACSA+ is available at Aetrix Electronics and suitable for digital voltmeter calibration, 16-bit SAR ADC reference, ATE pin electronics, and precision current source applications requiring stable component supply across industrial and test-equipment production lifecycles.
Supply support for MAX6225ACSA+ includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Maxim Integrated (now part of Analog Devices) designs high-performance analog and mixed-signal ICs for precision, power, and interface applications.
The MAX6225 belongs to Maxim's precision voltage reference product line, engineered specifically for metrology, automated test equipment, and high-resolution data conversion systems demanding laboratory-grade stability and ultra-low noise.
FAQ
What is the maximum input voltage rating for MAX6225ACSA+?
The MAX6225ACSA+ supports an absolute maximum input voltage of +40V on the IN pin, but its specified operating range is 8V to 36V. Operation above 36V risks exceeding safe power dissipation limits in the 8-pin SO package (471mW at +70°C), and sustained overvoltage may degrade long-term stability. Always maintain VIN within 8–36V for guaranteed performance per the datasheet.
Does MAX6225ACSA+ require an external capacitor on the NR pin?
No, the NR pin on MAX6225ACSA+ is optional: leaving it open maintains full specification compliance. Adding a 1μF capacitor reduces wideband noise by >20dB but does not affect DC accuracy, tempco, or long-term drift. Use only if system-level noise budgets demand sub-2μVP-P performance in the 10Hz–1kHz band.
Can MAX6225ACSA+ drive a 100μF output capacitor?
Yes, MAX6225ACSA+ is explicitly characterized and guaranteed stable with output capacitance from 0μF to 100μF across all load currents (±15mA). This eliminates the need for series isolation resistors in applications requiring bulk decoupling near high-current DACs or op-amps, preserving transient response and minimizing phase margin risk.
What is the trim-adjustment range of MAX6225ACSA+?
The TRIM pin on MAX6225ACSA+ enables ±15mV (±0.6%) output adjustment using a 10kΩ potentiometer connected between OUT and GND, with the wiper to TRIM. This range preserves the device's 1.0ppm/°C temperature coefficient and does not degrade initial accuracy or long-term stability-enabling system-level calibration without sacrificing reference-grade performance.
Is MAX6225ACSA+ compatible with lead-free reflow soldering?
Yes, MAX6225ACSA+ carries the "+" suffix indicating RoHS-compliant, lead-free packaging. It is qualified for Pb-free reflow soldering at peak temperatures up to +260°C (per JEDEC J-STD-020), matching standard 8-pin SOIC reflow profiles. No special thermal ramp rates or dwell times are required beyond standard Pb-free process guidelines.
MAX6225ACSA+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Series:
- -
- Packaging:
- Tube
- Product Status:
- Active
- Reference Type:
- Series, Buried Zener
- Output Type:
- Fixed
- Voltage - Output (Min/Fixed):
- 2.5V
- Voltage - Output (Max):
- -
- Current - Output:
- 15 mA
- Tolerance:
- ±0.04%
- Temperature Coefficient:
- 2ppm/°C
- Noise - 0.1Hz to 10Hz:
- 1.5µVp-p
- Noise - 10Hz to 10kHz:
- 1.3µVrms
- Voltage - Input:
- 8V ~ 36V
- Current - Supply:
- 3mA
- Current - Cathode:
- -
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MAX6225ACSA+ FAQ
1.How can I place an order for MAX6225ACSA+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX6225ACSA+ on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MAX6225ACSA+ reliable?
The price and inventory of MAX6225ACSA+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX6225ACSA+ is usually 5 days.
3.What payment methods are accepted for MAX6225ACSA+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX6225ACSA+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX6225ACSA+?
MAX6225ACSA+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX6225ACSA+ order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MAX6225ACSA+?
For technical support, including MAX6225ACSA+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX6225ACSA+ requirements.
6.How does Aetrix verify that MAX6225ACSA+ is sourced from the original manufacturer or authorized distributors?
All MAX6225ACSA+ products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MAX6225ACSA+ meets industry standards.
7.What is the process for return or replacement of MAX6225ACSA+?
All MAX6225ACSA+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX6225ACSA+, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MAX6225ACSA+ part is unused and in its original packaging.
Return procedure for MAX6225ACSA+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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